The traditional french cuisine of Quebec was eaten by folks that regularly canoed hundreds of miles up and down rivers so they had an immense amount of physical activity to counter that out - an amount quite beyond what you'll get sitting at a desk job these days.

Sure. But it was also eaten by folks that stayed home all day. By store clerks and children and school teachers and grandparents and other normal, every day folks. Other folks on different traditional diets worked hard too.